RA-related comorbidities as potential predictors of healthcare expenditure and work-related outcomes.
| Condition | ICD-9-CM Codes |
|---|---|
| Asthma | 493 |
| Cancer | 140–239 |
| Chronic obstructive pulmonary disease | 491, 492, 496 |
| Depression | 311 |
| Diabetes | 250 |
| Disorders of the eye and adnexa | 360–379 |
| Disorders of lipid metabolism | 272 |
| Heart failure | 428 |
| Hypertension | 401 |
| Myocardial infarction | 410, 412 |
| Osteoporosis | 733 |
| Peptic ulcer | 531, 532, 533, 534 |
| Stroke | 430, 431, 432, 433, 434, 436, 437, 438 |
ICD-9-CM: International Classification of Diseases, 9th revision, Clinical Modification; RA: rheumatoid arthritis.